EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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She dropped it
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The magnet in the tv scrambled the magnetic domain of her room key card demagnetizing the card
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The TV had gotten hot
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None of the above
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Detailed explanation-1: -Magnetism is caused by the motion of electric charges. Every substance is made up of tiny units called atoms. Each atom has electrons, particles that carry electric charges. Spinning like tops, the electrons circle the nucleus, or core, of an atom.
Detailed explanation-2: -This is because magnets attract materials that have unpaired electrons that spin in the same direction. In other words, the quality that turns a metal into a magnet also attracts the metal to magnets. Many other elements are diamagnetic-their unpaired atoms create a field that weakly repels a magnet.
Detailed explanation-3: -Magnetism is the ability of a material to be attracted by a magnet and to act as a magnet. A material can be magnetized if all of its magnetic domains can be aligned. Magnetic domains are regions of matter where north and south poles of atoms line up in the same direction.
Detailed explanation-4: -An electromagnet is a temporary magnet formed by winding a coil of wire round a piece of soft iron, and passing an electric current through it.